5.2.1Apply understanding of models for division (e.g., equal-sized groups, arrays, area models, equal intervals on the number line) and the relationship of division to multiplication to solve problems.

5.2.3Select and use appropriate estimation strategies for division (e.g., use benchmarks, overestimate, under estimate, round) to calculate mentally based on the problem situation whencomputing with whole numbers.

5.3.3Describe three-dimensional shapes (triangular and rectangularprisms, cube, triangular- and square-based pyramids, cylinder, cone, and sphere) by the number of edges,faces, and/or vertices as well as types of faces.

5.3.9Identify and measure necessary attributes of shapes to usearea, surface area, and volume formulas to solve problems (e.g., to find which of two gift boxes needs the most wrappingpaper or has the greater volume?).